Phosphatidylinositol glycan anchor biosynthesis class P protein (PIGP)

Phosphatidylinositol glycan anchor biosynthesis class P protein (PIGP) is a subunit of the glycosylphosphatidylinositol-N-acetylglucosaminyltransferase (GPI-GnT) complex, responsible for catalyzing the transfer of N-acetylglucosamine from UDP-N-acetylglucosamine to phosphatidylinositol in the first step of GPI-anchor biosynthesis[1][2][3]. The GPI anchor is a glycolipid that attaches various proteins to the cell membrane, influencing a wide spectrum of cellular functions and protein localization. The *PIGP* gene is located on human chromosome 21 within the Down syndrome critical region and is a candidate for contributing to Down syndrome pathogenesis. Pathogenic variants affecting PIGP have been linked to developmental and epileptic encephalopathies, multiple congenital anomalies, and seizure syndromes, highlighting its essential role in neurodevelopment and cellular homeostasis[2]. No drugs or clinical biomarkers are currently in use that specifically target PIGP, and there are no reported safety concerns or therapeutic challenges directly associated with it as a target[1][2][3].

Other names

Phosphatidylinositol N-acetylglucosaminyltransferase subunit PPhosphatidylinositol-glycan biosynthesis class P proteinPIG-PDCRCDSCR5DSRCDown syndrome critical region protein 5Down syndrome critical region protein CEIEE55DCRC-SNPD010